Naslov
Epikarst hydrology - an insight from the Croatian cave monitoring

Autori
Lončar, Nina ; Surić, Maša ; Bočić, Neven ; Lončarić, Robert

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstract of Volume of the 9th International Conference on Geomorphology / - Delhi : International Association of Geomorphologists, lndian lnstitute of Geomorphologists (lGl), 2017, 1-1

Skup
9th International Conference on Geomorphology

Mjesto i datum
New Delhi, Indija, 06.11.2017. - 11.11.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
karst ; hidrology ; cave ; monitoring ; Croatia

Sažetak
Understanding of karst hydrology and identifying its influence on speleothem capture of climate and environmental proxies gets an increasing role in paleoclimate research. Recent studies have revealed that karst hydrogeology acquires important part in controlling cave water geochemistry and thus stalagmite chemistry and mineralogy. Here we present the results of parallel 2-year monthly cave monitoring of Nova Grgosova Cave (NG), Lokvarka Cave (LOK) and Modrič Cave (MOD), focused on understanding karst drip water hydrogeology and the relationship between surface climate, drip hydrology and speleothem morphology. Caves are located in parts of Croatia which differ by lithology, morphology, climate settings and altitude. In order to evaluate the influence of parameters such as temperature and rainfall amount on variability of drip rate and stalagmite deposition, surface and cave air temperature and relative humidity and cave water drip rates were measured at high resolution from November 2014 to November 2016. Seven drip loggers were installed at the sites of sampled speleothems. Drip intensity monitoring was performed by an automated acoustic drip counter set to record drips/hour values. All caves recorded low temperature variations and stable cave environments while dripwater intensities displayed different hydrological regimes. MOD drip sites with the seepage flows practically do not react to precipitation events, LOK drip sites show fracture-flow regime with fast response to rain events, while NG drip sites show substantial differences in hydrological response, within only few meters apart. Correlation between the hydrological behaviour and macroscopically observed growth of speleothems pattern is apparent. Drip sites with slow drip rates of low variability, produced the 'candlestick' speleothems with the most homogenous internal structure while speleothems deposited under the fast drip rate are irregular and with large portion of detritus. This research was supported by the Croatian Science Foundation (project no. HRZZ- IP-11-2013-1623, Reconstruction of the Quaternary environment in Croatia using isotope methods – REQUENCRIM).

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Interdisciplinarne prirodne znanosti, Geografija

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